Common Eider

Somateria mollissima

The common eider is the largest duck in the northern hemisphere; an adult weighs 1300–2660 grams (2.8–5.9 lbs) and is 50–71 cm (20–28 in.) long. Males are somewhat larger than females; size varies among races. The eider is a heavy-bodied sea duck with a relatively short, stout neck and a distinctive long, triangular (wedge-shaped) bill.

Sea Duck Information Series fact sheet

Species Knowledge Summary and Information Needs
Pacific Common Eider [PDF]
Northern Common Eider [PDF])
Hudson Bay Common Eider (document coming soon)
American Common Eider [PDF]

Aerial Identification video

Common Eider Photo Gallery

Common Eider Range Maps

American race COEIhudson_300mini
COEInorthern_300mini COEIpacific_300mini

More Information, Publications, and Proceedings

Wellfleet Bay Virus Workshop (American Common Eider), June 2014 – abstracts (pdf)

Wellfleet Bay Virus Workshop (American Common Eider), October 2015 – abstracts (pdf)

Duvetnor – Common Eiders and eider down harvest in Quebec

Article about common eider satellite telemetry on Rhode Island coast


The SDJV promotes the conservation of all North American sea ducks through partnerships by providing greater knowledge and understanding for effective management.

Funding Opportunity for FY2017

Funding Opportunity for FY2017; opened July 8, closed Sept 26, 2016. Due to multi-year funding commitments, there will be no Funding Opportunity for FY2018

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